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Title: | Technical Note: Dissolved organic matter fluorescence a finite mixture approach to deconvolve excitation-emission matrices |
Author: | Butturini, Andrea Ejarque, E. |
Keywords: | Ecologia aquàtica Nutrients (Medi ambient) Fluorescència Algorismes Aquatic ecology Nutrients (Ecology) Fluorescence Algorithms |
Issue Date: | 6-Sep-2013 |
Publisher: | European Geosciences Union |
Abstract: | The analysis of the shape of excitation-emission matrices (EEMs) is a relevant tool for exploring the origin, transport and fate of dissolved organic matter (DOM) in aquatic ecosystems. Within this context, the decomposition of EEMs is acquiring a notable relevance. A simple mathematical algorithm that automatically deconvolves individual EEMs is described, creating new possibilities for the comparison of DOM fluorescence properties and EEMs that are very different from each other. A mixture model approach is adopted to decompose complex surfaces into sub-peaks. The laplacian operator and the Nelder-Mead optimisation algorithm are implemented to individuate and automatically locate potential peaks in the EEM landscape. The EEMs of a simple artificial mixture of fluorophores and DOM samples collected in a Mediterranean river are used to describe the model application and to illustrate a strategy that optimises the search for the optimal output. |
Note: | Reproducció del document publicat a: http://dx.doi.org/10.5194/bg-10-5875-2013 |
It is part of: | Biogeosciences, 2013, vol. 10 , p. 5875 -5887 |
URI: | http://hdl.handle.net/2445/46332 |
Related resource: | http://dx.doi.org/10.5194/bg-10-5875-2013 |
ISSN: | 1726-4170 |
Appears in Collections: | Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals) Publicacions de projectes de recerca finançats per la UE |
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